I am sorry, but I am confused. I thought you wanted a ref voltage around 23 volts. Based on this I am now unsure?
I say this because I was actually trying to find a solution for you, but now I am unsure what actual ref voltage you need.
Also, even though you ignored my previous question, I asked how would you test the accuracy of your circuit. This is a very valid question and one you should consider. A HP 8.5 digit meter cost is very expensive, so if you were doing this project to build a product, you would have to verify that your product meets your specifications. I was not trying to be a wise guy by asking this question.
I think you would have received better responses if you had stated your reason for needing such accuracy (which I am sorry to say, unrealistic).
One more thing. You are looking to make a unbelievably accurate reference and you wish to do so very inexpensively. Well I can tell ya, this is not going to happen. To achieve the accuracy you proposed in your earlier post would be anything but cheap. In fact to scale your voltage would require resistors in the neighborhood of hundreds of dollars.
You have misunderstood pretty much everything in this reply.
This was expected, and no problems.
I explored some factors that effect accuracy in order to make the best of the few dollars I have for components.
I do like pulling ideas apart, to understand more about how they work.
As a very successful electronic engineer once said to me, we just put chips together.
Not a degree in electronics, but an idea what to buy.
Components have changed in over 30 years, and asking for someones knowledge on Surface Mount technology seems valid.
The 23v reasoning has already been discussed and I have gratefully accepted my mistake and your replies, no worries.
Not here to argue, nor demand.
Sorry, but I don't want to argue for the truth on ever issue.
Moving on.
Anybody that has an interest to follow this post is welcome to ask me questions.